Italian Phrase
I gas trattengono il calore nell'atmosfera.
Meaning
The sentence means “The gases trap heat in the atmosphere.” It is used when talking about the greenhouse effect and climate change, emphasizing the role of atmospheric gases in retaining thermal energy.
When to use
Use this sentence in scientific discussions, environmental news reports, or classroom explanations about climate change. It is also appropriate in everyday conversation when you want to point out why the planet is warming.
✦Grammar Breakdown
Igastrattengonoilcalorenell'atmosfera
Article Agreement
“I” is the masculine plural definite article that matches the noun “gas,” which is masculine plural in Italian.
Verb Conjugation – Trattenere
“Trattengono” is the third‑person plural present indicative of “trattenere,” used when the subject is plural (i gas).
Direct Object – il calore
The direct object takes the masculine singular article “il” because “calore” is masculine singular.
Prepositional Contraction – nell'
“In” + the definite article “l'” (used before a vowel) contracts to “nell'.”
Noun – atmosfera
“Atmosfera” is a feminine singular noun, so the article after the contraction is “l'" (not “la”).
🗨In Conversation
Sai perché le temperature stanno aumentando?
Do you know why temperatures are rising?
I gas trattengono il calore nell'atmosfera, creando l'effetto serra.
The gases trap heat in the atmosphere, creating the greenhouse effect.
✕Common Mistakes
I gas trattano il calore nell'atmosfera.
Do not use “trattano” – the correct verb is “trattenere,” not “trattare.”
I gas trattengono il calore in la atmosfera.
Because “atmosfera” starts with a vowel, the article contracts to “l'"; you must say “nell'atmosfera.”
Il gas trattengono il calore nell'atmosfera.
If you refer to a specific type of gas, you can use the singular “Il gas,” but with a plural meaning you need “I gas.”
↔Alternatives
I gas trattengono il calore nell'aria.
The gases trap heat in the air.
I gas serbano il calore nell'atmosfera.
The gases retain heat in the atmosphere.
I gas intrappolano il calore atmosferico.
The gases trap atmospheric heat.
Cultural Tip
In Italian, the word “gas” is masculine plural (i gas) and the verb “trattenere” is often used in scientific contexts. When discussing climate topics, Italians may also use the phrase “effetto serra” (greenhouse effect). Be aware that “nell'” contracts “in + l'” before a vowel, so you say “nell'atmosfera” rather than “in la atmosfera.”